Generally, tires should be no older than 10 years. However, when is the right time to replace your tires?

• When the tire has visible cracks on the sidewall
• When the tread depth is 3 millimeters or less
• When the tread is worn down to 1.5 millimeters or the tread-wear indicators are visible
  Explanation:

  "Tires should be replaced when the tread is worn to 1.5 millimeters or when the tread-wear indicators appear, as this indicates reduced traction."
• When the tire’s brand name becomes unreadable